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JUCS - Journal of Universal Computer Science 19(10): 1474-1495
doi:
10.3217/jucs-019-10-1474
Received:
15 Mar 2013 | Approved:
27 May 2013 | Published:
28 May 2013
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Authors
Howard Spoelstra
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Open University of the Netherlands, Heerlen, Netherlands
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Open University of the Netherlands, Heerlen, Netherlands
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Open University of the Netherlands, Heerlen, Netherlands
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Open University of the Netherlands, Heerlen, Netherlands
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Open Universiteit Nederland, Heerlen, Netherlands
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Conflict of interest
The authors have declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.